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Plasma Serine to Cysteine Ratio as a Biological Marker for Psychosis

Published online by Cambridge University Press:  29 January 2018

Rafiq Waziri
Affiliation:
Department of Psychiatry, University of Iowa Hospitals and Clinics, 500 Newtown Road, Iowa City, Iowa 52242
Rick Wilson
Affiliation:
University of Iowa Hospitals and Clinics, Iowa City
Arnold D. Sherman
Affiliation:
Department of Psychiatry, University of Iowa Hospitals and Clinics, Iowa City

Summary

In a study of plasma amino acids in psychiatric patients, serine to cysteine (S/C) ratio was higher (S/C = 1.57±0.28) in 57 psychotics compared to 27 nonpsychotics (S/C = 1.06±0.23). This difference was highly significant at P <0.001. Psychotic patients were given a psychosis score (p score) of 1–4, The S/C ratios of individual patients were significantly correlated to their p scores (r = 0.65, P <0.001). S/C ratios were not related to diagnosis, age, sex, food intake and medications. When the initial S/C ratio and p scores of 22 patients were compared to their S/C ratio and p score at the time when they were improved and ready to be discharged, there was a concomitant fall both in S/C ratios and p scores suggesting the high S/C ratios may be indicative of a state rather than a trait characteristic. Our findings lead us to the conclusion that S/C ratios may provide a marker for the presence of psychosis and an index of its severity.

Type
Research Article
Copyright
Copyright © 1983 The Royal College of Psychiatrists 

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References

Carroll, B. G., Martin, F. I. R. & Davis, B. (1978) Resistance to suppression by dexamethasone of plasma 11–OHCS levels in severe depressive illness. British Medical Journal, 3, 285–7.Google Scholar
Delisi, L. E., Phelps, B. H., Wise, C. D., Apostoles, P. S., Bigelow, L. & Wyatt, R. J. (1981a) The effect of neuroleptic medications on plasma dopamine beta-hydroxylase activity, Biological Psychiatry, 16, 873–8.Google Scholar
Delisi, L. E., Wise, C. D., Bridge, J. R., Rosenblatt, J. E., Potkin, S. G. & Wyatt, R. J. (1981b) A probable neuroleptic effect on platelet monoamine oxidase in chronic schizophrenic patients. Psychiatry Research, 4, 95107.CrossRefGoogle ScholarPubMed
Dienstag, J. L., Carter, E. A., Wand, J. R., Isselbacher, K. J. & Fischer, J. E. (1978) Plasma alpha-amino-n-butyric acid to leucine ratio: Nonspecificity as a marker for alcoholism. Gastroenterology, 75, 561–5.Google Scholar
Ellingboe, J., Mendelsohn, J. H., Varanelli, C. C., Neuberger, O. & Coryson, M. (1978) Plasma alpha-amino-n-butyric acid: leucine ratio; normal values in alcoholics. Journal of Studies of Alcohol, 39, 1467–76.CrossRefGoogle ScholarPubMed
Fugita, D., Ho, T., Maratu, K., Terdere, R., Beppu, H., Nakagume, Y., Kato, V., Nagutsu, T. & Kato, T. (1980) Serum dopamine beta-hydroxylase in schizophrenic patients, Journal of Neurochemistry, 30, 1569–72.Google Scholar
Gosling, R., Kerry, R. J., Orme, J. E. & Owen, G. (1972) Creatine phosphokinase activity in newly admitted psychiatric patients. British Journal of Psychiatry, 121, 351–5.CrossRefGoogle ScholarPubMed
Harding, T. (1974) Serum creatine kinase in acute psychosis. British Journal of Psychiatry, 125, 280–5.CrossRefGoogle ScholarPubMed
Meltzer, H. Y. (1968) Creatine kinase and aldolase in serum: Abnormality common to acute psychoses. Science, 159, 1368–70.Google Scholar
Meltzer, H. Y. (1973) Creatine phosphokinase activity and clinical symptomalogy: A study in acute schizophrenic patients. Archives of General Psychiatry, 29, 589–93.Google Scholar
Meltzer, H. Y. (1975) Neuromuscular dysfunction in the major mental illnesses: Serum enzyme studies. Research Publication for the Association of Research in Nervous Mental Disease, 54, 165–88.Google Scholar
Meltzer, H. Y., Ross-Stanton, J. & Schlessinger, J. (1980) Mean serum creatine kinase activity in patients with functional psychoses. Archives of General Psychiatry, 37, 650–5.Google Scholar
Morgan, M. Y., Milson, J. P. & Sherlock, S. (1977) Ratio of plasma alpha-amino-n-butyric acid to leucine as an empirical marker of alcoholism: Diagnostic Value. Science, 197, 1183–5.CrossRefGoogle ScholarPubMed
Murphy, D. L. & Wyatt, R. J. (1975a) Neurotransmitter related enzymes in the major psychiatric disorders: I. catechol-o-methyl transferase and monoamine oxidase in the affective disorders and factors affecting some behaviorally correlated enzyme activities. Biology of Major Psychoses, Research Publication for the Association for Research in Nervous Mental Diseases, 54, 277–88.Google ScholarPubMed
Murphy, D. L. (1975b) Neurotransmitter related enzymes in major psychoses: II MAO and DBH in schizophrenia. Biology of Major Psychoses, Research Publication for the Association for Research in Nervous Mental Diseases, 54, 289–97.Google Scholar
Pepplinkhuizen, L., Blom, W., Bruinvels, J. & Moleman, P. (1980) Schizophrenia-like psychosis caused by a metabolic disorder. Lancet, 1, 8166, 454–6.Google Scholar
Schelesser, M. H., Winokur, G. & Sherman, B. M. (1980) Hypothalmic-pituitary-adrenal axis activity in depressive illness: Its relationship to classification. Archives of General Psychiatry, 37, 737–43.Google Scholar
Schiavone, D. J. & Kaldor, J. (1965) Creatine phosphokinase levels and cerebral disease. Medical Journal of Australia, 2, 790–2.Google Scholar
Shaw, S., Stimer, B. & Lieber, C. S. (1976) Plasma alpha-amino-n-butyric acid to leucine ratio: An empirical biochemical marker of alcoholism. Science, 194, 1057–8.Google Scholar
Shaw, S., Lue, S-L & Lieber, C. S. (1978) Biochemical tests in the detection of alcoholism: Comparison of plasma alpha amino-n-butyric acid with other available tests. Alcoholism: Clinical and Experimental Research, 2, 37.Google Scholar
Stokes, P. E., Pick, G. R., Stoll, P. M. & Nunn, W. D. (1975) Pituitary – adrenal function in depressed patients: resistance to dexamethosone suppression. Journal of Psychiatric Research, 12, 271–81.Google Scholar
Stolk, J. M., Hurst, J. H., Friedman, M. J., Harris, P. O., Van Riper, D. H. & Nisula, B. C. (1980) Serum dopamine-B-hydroxylase: Indicator of what? Enzymes and Neurotransmitters in Mental Disease, (eds. Usdin, E., Sourkes, T. L., Youdin, M. B. H.). New York: J. Wiley.Google Scholar
Tuason, U. B., Oleshansky, M. A. & Jaranson, J. M. (1974) Creatine phosphokinase in functional psychosis. Comprehensive Psychiatry, 15, 435–8.Google Scholar
Wyatt, R. J., Potion, S. G., Phelps, B. H. & Wise, C. D. (1980) Monoamine oxidase in schizophrenia: An overview. Schizophrenia Bulletin, 6, 199207.Google Scholar
Zumwalt, R. W., Kuo, K. & Gelirke, C. W. (1971) A nanogram and picogram method for aminoacid analysis by gas chromatography. Journal of Chromatography, 57, 193208.Google Scholar
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